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(No Model.) 4 Sheets-8heet 1. H. J. FRIZELLE.

HEATER.

N0. 366,719. Patented July 19, 1887.

@OUD UQ (No Model.)

4 Sheets-Sheet 2'.

H. J. FRIZELLE.

HEATER.

Patented July 19, 1887.

UNITED STATES PATENT OFFICE.

HORACE J. FRIZELLE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- HALF TO CHARLES A. HURLBURT, OF SAME PLACE.

HEATER.

SPECIFICATION forming part of Letters Patent No. 366,719, dated July 19, 1887.

Application filed November 16, 1886. Serial No. 219,004.

To all whom, it may concern:

Be it known that I, HORACE J. FRIZELLE,

of Minneapolis, in the county of Hennepin and State of Minnesota, haveinvented certain Improvements in Heaters, of which the following is a specification.

This object of this invention is to provide a stove or furnace in which a large amount of air maybe heated bythe combustion of a small amount of fuel, the heated air being thrown out into the room in which the stove or heater is located,or being conveyed through suitable pipes or flues to the rooms or apartments that it is desired to heat.

Another object is to provide such a stove or furnace with means by which the foul air in the room or rooms of the building may be drawn into a chamber below the-firebox, and thence passed through the fire-box, thereby furnishing the draft for the fire,or passed into the combustion-chamber above the fire-box, where it will mingle with the products of combustion and pass with them into the smoke pipe.

Other objects of the invention will be disclosed in the detailed description which follows.

In the accompanying drawings, forming a part of this specification, Figure 1 is a central vertical sect-ion of one of my heaters. Fig. 2 is a similar section in a plane at right angles to that of Fig. 1. Fig. 3 is a horizontal sec tion on line X X of Fig. 2. Fig. 4 is a partial sectional elevation on lineY Y of Fig. 1. Fig. 5 is a view similar to Fig. 1, but showing the heating and draft pipes arranged to take their supplies of air from the room,but at different distances from the floor. Fig. 6 is a horizontal section on line Z Z of Fig. 5. Fig. 7 is a sectional elevation of a portion of a building, showing the manner of connecting the pipes to the heater when it is used as a hot-air furnacc.

In the drawings, 2 represents the casing of the stove or furnace, and it may be of any suitable size, shape, or construction. Supported within the casing is a suitable fire-pot, 3, below which is an ash-box, 5, which may'have a chute, 7, through which the ashes maybe discharged into a pit or room below. The furnace is provided with a suitable fire-door, 9,

(No model.)

and ash-door 11. Extending around three sides of the ash-chamber is an airchamber, 13. (See Fig. 3.) This chamber I designate the draft and ventilating chamber. It is divided into two compartments by a horizontal partition, 15, which is provided with openings 17 and dampers 19. The wall between the airchamber and the ash-box is also provided with openings 21 and dampers 23. I prefer to provide a combined damper, 19 23, which, when in position to close the openings 17, will leave the openings 21 uncovered, and vice versa. Any suitable construction of dampers may be used for this purpose. A pipe, 25, opens into the chamber 13, being preferably branched near its end, and connecting with both sides of the chamber. When the heater is placed directly in the room to be heated, this pipe may lead from a point near the door of the room, as shown in Fig. 5. \Vhen the heater is placed in the cellar or basement of the house to be heated,as hot-air furnaces are commonly placed, it may be connected with suitable flues, 26, leading from the rooms of the building, as shown in Fig. 7. In either case it will draw a supply of air from the room which will be more or less mixed with carbonic-acid gas. IVhen the dampers 23 are open, this air will pass into the ash-box below the grate, and will pass thence through the firepot and supply the oxygen necessary for the combustion of the fuel.

\Vhen it is desired to check the fire, the damper 19 is opened and the damper 23 closed. The air will then pass from the ainchamber 13 into the combustion-chamber above the fire-pot, where it will mingle with the pro ducts of combustion and pass out of the combustion-chamber into the smoke-flue. By this means I am enabled to thoroughly ventilate the rooms of the house and to check the fire by closing its draft, without checking the ventilating-current.

Outside of the air-chamber 13 is another airchamber, 27, which is preferably formed as a continuous chamber, extending around three sides of the furnace, as shown in Fig. 3. This chamber I designate the fresh-air chamber. It extends, preferably, to substantially the same height as the firepot. A pipe, 29, is provided with. several bran chcs that connect it with each 2 sea-119 compartment of the chamber 27 This pipe is to be connected with a suitable fresh-air fine, 28, so as to take the supply of fresh air from outside the building and conduct it into the chamber 27, as shown in Fig. 7. From the chamber 27 the fresh air passes into the heating-fines, as hereinafter described, and is then thrown out into the room from these fines, or

is conducted to the rooms of the building through suitable fines, 30, (see Fig. 7,) in the usual way.

It is usually desirable to heat the rooms by. means of heated fresh air only, and not to reheat the air of the rooms. Sometimes, however, it is desirable to heat the rooms quickly, and when the fire is low, if the atmosphere outside is at a low temperature, it will take considerable time to heat fresh air drawn from outside the .bnilding. Under these circumstances the air of the rooms may be passed back through the furnace and reheated and again conducted into the rooms. For this purpose I provide a series of openings, 31, in the wall between the air-chamber 13 and the air-chamber 27. These openings I provide with dampers 33, which may close the openings or may close the pipes 25. When it is desired to reheat the air of the rooms, the dampers 33 may be moved to uncover the openings 31 and cover the ends of the pipes 29. A part of the air that passes into the chamber 13 through the pipe 25 will pass into the chamber 27, and then into the heating fines and back into the rooms. To the top of the air-chamber 27 is secured a series of heat- I ing fines or pipes, 35, that extend upward through the combustion-chamber. Each of these fines has a revertible portion extending horizontally across the combustion-chamber and back again, as shown in Figs. 1 and 2.

Each fine may be formed of vsuitable straight.

tubes, the horizontal tubes being connected to the vertical tubes and to each other by suita-- ble' couplings. The tubes upon the opposite sides of the combustion-chamber are arranged alternately with each other, so that the horizontal portions of one series come between the horizontal portions of the other, and the two series together form a horizontal partition extending across the combustion-chamber. A similar series of fines is arranged at the back side of the combustion-chamber, but with its horizontal revertible portions at a point above the horizontal portions of the other fines, as shown in Figs. 1 and 2.

A plate, 37, placed over the lower revertible fines extends entirely across the combustion-chamber, andis provided at the rear of the chamber with a damper, 39. A plate, 41, is placed over the upper fines and extends nearly to the front of the chamber, as shown in Fig. 2. A space is also left between the I ends of the upper fines andthe wall of the combustion-chamber, permitting the products of combustion to pass between the ends of the fines and the wall of the chamber.

A plate, 43, of soapstoneor other suitable material, may be placed under the revertible fines over the fire-pot to protect the fines from the extreme heat of the fire. A similar plate may be placed under the upper revertible fines and under the top plate of the chamber, if preferred.

The combustion-chamber is, it will be seen, divided into three sections-one below the lower revertible fines, one between the lower and upper fines, and one above the upper fines. The products of combustion rising from the firepot pass along under the lower fines to the back of the chamber, thence above the fines through the opening in the plate 37, thence along under the upper fines to the front of the chamber, thence above the fines through the space between the ends of the fines and the wall of the chamber, thence along over the fines to the back of the chamber, and out through the smokepipe.

The fresh air from the fresh-air chamber 27 passes into the fines 35, and as it rises in'them it passes horizontally across and back through the combustion-chamber in the horizontal revertible portions of the fines. revertible fines the air will have a slow passage, and at the same time be subjected to the high temperature resulting from the passage of theprodncts of combustion along under and over said fines. passes into the air-chambere't5 atthe top of the furnace, from which it'may pass into the room or rooms through fines connected with the chamber, as shown in Fig. 7, or through suitable openings in its walls, as shown in Figs. 1 and 2.

At each back corner of the furnace I locate a divingfine, 47, whose upper open end is substantially on a level with the top of the fire pot.. The lower endofthis fine communicates with a horizontal fine, 49, extending to the front of the furnace outside the fresh-air chamber 27. (See Figs. 1 and 3 At its forward end this fiuecounects with-a vertical fine, 51,

whose npperend opens into the second or middle section of the furnace above the plate 37. WVhen the damper 39 is closed, the products of combustion, after passing under the first -chamber 27 and inlraising the temperature of These diving-fines V the air contained therein. maybe arranged at the front of the furnace instead of being at the back, if preferred.

It will bese'en from the foregoing description that the heater may be used either as a Through these The heated air from the fines A ICO stove or as a hot-air furnace, that it will raise a large amount of air toa high temperature.

with a small quantity of fuel, and that it affords an excellent ventilating means for the rooms of the house.

When the heateris used as a stove and is set in the room that is to be heated by it, the pipes 25 and 29 may both take their supply of air from the room, the pipe 25 taking its air from the point near the floor, so that the foul air will be drawn into it and thrown into the combustionchamber, while the pipes 29 take their air at a higher level, and thus receive a supply of purer air, which will be reheated and again passed out into the room. This arrangement olpipes is clearly shown in Fig. 5.

I prefer that in all instances the draft-pipe 25 shall communicate with the heater through its bottom plate, so that the air for the draft of the heater is drawn from a point near the floor, and thus the foul air of the room is taken into the heater and passed out through the smoke-pipe. The heater thus serves as an ellicient means for ventilating the rooms in which it is placed or with which it is connected.

I claim as my invention- 1. In aheatcr of the class described, the combination, with the fire-pot and the ash-box, of the two air-chambers 13 and 27, surrounding the base of the heater, the inner chamber communicating both with the ash-box and the combustion-chamber above the fire-pot, dampers controlling the openings between said chamber and said fire-pot and combustion-chamber, and aseries of heating-t]ucs,35,connecting with said outer chamber and extending through said combustion-chamber above said fire-pot,'substantially as described.

2. The combination, in a heater, with the fire-pot 3 and the ash-box 5, of the chamber 13,'s1.1rrounding the ash'box and provided with openings communicating with the ash box and other openings comnuinicating with the combustion-chambcr above the fire-pot, and the chamber 27, surrounding the chamber 13 and extending to the top of the fire-pot, and revertible heatingtlues 35,extendiug from said chamber through the combustionchamber above the firepot, substantially as described.

3. The combination, in a heater, with the fire-pot and combustion-chamber, of the freshair chamber 27, surrounding the fire-pot upon three sides of the heater, the heating-dues 35, connected with saidchamber, the side flues having revertible portions extending horizontally across and back through the combustionchamber and alternating with each other,and the rear flucs having revertiblc portions extending horizontally across and back in said combustion-chamber at a higher level than the revertible portions of the side flues, all substantially as described.

4. The combination, in a. heater, with the firepot and combustion-chamber, of the airchamber 27, surrounding the firepot, the heating-fines 35, connected with said air-chamber, and extending horizontally across and back through said combustion-chamber and dividing said chamber into separate sections, the plate 37 above the lower section, having the damper 39, and the diving-flue connected with said lower section of the combustionchamber,

extending downward and along said chamber 27 and upward into the combustion-chamber above the plate 37, substantially as described,

and for the purpose set forth.

5. In a heater of the class described, the combination, with the combustion-chamber, ot' the series of flues 35, arranged at each side and at the back of said chamber, the side tlnes having the revertible' portions extending in opposite directions horizontally across and back through said chamber from one side to the other on the same level and alternating with each other, and the back flues having the revertible portions extending at a higher level across and back through said chamber, substantially as described.

6. The combination, in a heater of the class described, with the combustion-chamber divided by the horizontally-revertible fines into a series of sections, of the freslrair chamber 27, surrounding the base of the heater, and the diving-flues47 49 51, extending from the lower section of the combustion-chamber to thebase, along the lresh-air chamber, and up into the second section of the combustion -chamber, substantially as described.

7. The combination, with the combustionchambcr and air heating flues extending through the combustion -'chamber above the fire-pot, ol' the fresh-air chamber 27 communicating with said lines, the pipes 29, communicating with said chamber, the ventilating and draft chamber 13, communicating both with the combustion-ehamber and with said chamber 27, and suitable dampers, as 33, by means of which either the pipes 29 or the openings between the chamber 13 and the chamber 27 may be closed, substantially as described, and for the purpose set forth.

8. The combination, in a heater, with the combustionchamber and firepot, of the draft and ventilating chamber 13, communicating both with the tirepot and the combustionchamber above the fire-pot, the pipe 25, connected with said chamber and extending below the base of the heater, the air-chamber 27, the heating-fines 35, connected with said chamber and extending through the combustionchamber, and the pipes 29, connected with said airchamher and arranged to take their sup ply of air at a higher level than the pipe 25, as and for the purpose set forth..

9. The combination, in a heater, with the combustioirchamber and firepot, of the draft and ventilating pipe 25,extending downwardly from said heater, the ai rchamber 27 surrounding the base of the heater, the heating-fines 35, connected with said chamber and extending through the combustion chamber, and the pipes 29, connected with said air-chamber and arranged to take their supply of air at a higher level than the pipe 25, substantially as described.

10. The combination, in a heater, with the combustion-chamber and fire-pot, of the series of air-heating lines 35, arranged to take a supply of air at their lower ends, and having the horizontally revcrtible portions extending ings communicating with the combustionacross the combustion-chamber above thefirechamber above the fire-pot, substantially as pot and dividing said combustion-chamber described.

into separate sections, and the draft and ven- HORACE J. FRIZELLE. 5 tilating chamber 13 at the base of the heater, In presence ofprovided with openings communicating with R. H. SANFORD,

the ash-box below the fire-p0t and other open- 1 R. (3. PAUL. 

